US2225762A - Oven rack glide - Google Patents

Description

A. BARNsTl-:INER n 2,225,762

Dec. 24, N1940;

' OVEN RACK GLIDE Filed Nov. so, 1937 tra@ W R../ mk mm vr m w w ATTRNEY wnNEssEs; m. Lu/MMP 0 vPatented Dec. 24V, 1940 ovENi RACK GLIDE Alfons Barnsteiner, Mansfield, Ohio, assignor to l Westinghouse Electric & Manufacturing Company,East.Pittsburgh, Pa., a corporation` of Pennsylvania 'Application Npvemher ao,1937,seria1N0.1'77,31o

-. 17 Claims.` Myx-invention relates to ovens and more particularly Vto the `formationY and attachment of rack glides to the inner Walls thereof;-4

According lto present practice," the rack glides for` ovens constitute separate members `located within,theovens`` In somevcases the glides have been welded or otherwise rigidly` attached tothe oven walls, thisifbein'g4 done in order to permit relatively ,closfefvertical vspacing of` the glides, which closes'paeing. couldnot be accomplished. by stamping "outtheglides without4 rupturing the metal, i, It is, therefore, an object of my invention to Aprovide a7 structure vembodying stamped outglidsrelatively closely spaced Aon the side for supporting theA rack invariine; i

fOther Aobjectsof my invention 'will either be pointed outspeciilcally in thecurse of the followingy description ofma device embodying my incfr the line lill-III of Fig. 2; i i v L 4 is an' `elevationalview of a.;` sheet metal rstriplinoneustep during the process of being Fig'. 5 is` a` elevatipnalview similar t`o Fig. 4

with the stripin a :secondprocessing step; i

Fig. 6 is an enlarged sectional view taken along theline VI-.VIofFig.5; A i i I Figs. 7, 8 and9 are views similar toFigs. 4,'5

and 6, respectively, of uthe ,inodied form' ofmy invention shownin Fig. 10;`

i an oven Wall; and 1j.; i i

Fig. 11 is a partial side' view correspondingto Fig. 2 with the ystrips "operatively associated therewith. v l i Referring to the accompanying sheet of drawings, I show an`oven casing I0 having relatively large and shallow depressed portions I2 and"|2q in the sidewalls thereof and a plurality of corrugated metallic strips I4 operatively associated heet materialalone wouldp'ermit without tear-v Fig. 1o is a-view similar req-Fig.. 2 `"oramediata` form of my invention asv applied to a portion of c with the side walls ofthe oven I0 within theldepressed portions I2. The side walls IIl ofthe oven IIJ are depressed by suitable dies caused to form the substantially rectangularlyrshaped des pressions I2 and I2a (the latter being smaller) in the sides thereof as shown in Figs. `2 and 3. The depressions I2 and I2a may be formed inwardly so that they will be viewed` substantially 2.- `as embossed orraised portions from theinside of the oven. Preferably at, the same` time that the depressed portions I2 and I2a are formed within the side Walls II of the oven I0, elongated apertures I8 are punchedwithin the-.connes of each depression. The apertures I 81are located substantially ina series of horizontal lines while an additional set of apertures` I,8a, formed in larger depression I24 only, are slightly raised from the horizontal line of theapertures I8.

The corrugated strips I4 are lformed out of sheet metal blanks or strips liwhich `are substantially rectangular in shape,` as shown in Fig. 4. The sheet metali blank I5is then transversely slotted'with slots `2(I located,intermediate the points at which the corrugations 22 in oven wall areto be formed. lThese transverseislots cut therein donot intersect either edge of such strip or blank. The slotted strip I5.- is then pressed within suitable dies sothat as the'dies mate in the sheet material between slots 20, the metal located between the slots is drawn in such manner that the flutes 22 will be formed therein as shown in Figs. 5 and 6. The metal between the slots 20 iiows towards the corrugated ilutes 22, permitting such flutes to be'formed Vwithout actually rupturing the sheet metal. A,In other words. the metalof the sheet metal blank ;I5 will flow downwardly into the forming dies in such a manner that the slots 20 will 'be ldrawn apart into irregular elliptical shaped apertures,` substantially as shown at 23 in Fig. 5. 'Ihe metal along the edge of the strip I5 adjacent to theslots 20 vmay -be necked in dueto the, fiow ofmmetalsubstantially as shown at 25 inFig. 5., It is to be understood that the flutes or corrugations are satisiac` torily formed within the sheetmetalblank without tearing the sheet primarily dueto the presenceof the slots 20, which permit Vthe metal adjacent thereto to flow down into the forming dies,V

`any manner desired; However, itis preferred If thede` that they be spot welded thereto.

' t of the parts cooperating therewith.

pressed portion equal to the thickness of I2 be of a depth substantially the fluted strip il, it is f vobvious that the outer surface of the side walls of the oven I will' be substantially smooth, and the assembly of the oven in a range does not require any special handling thereof or preparation and the attached iluted strips may be enameled,

whereupon the inner surface of the oven walls will have the appearance of a single solid structure having flutes or corrugatlons smoothly exv tendinginwardly within the side walls of the Oven.

f By having the apertures I8 and the flutes operatively associated therewith in a horizontal line, it is? obvious that such ilutes will support a rack 24 or .the like, which may be readily slid within the oven.

`If 'it bedesired, the apertures located within the depressedjportions i2 may be of considerable length as shown in'Fig.l0. With the oven vwall being formedinsuch a manner, the corrugations 22 may be singly formed from sheets or blocks as shown in Figs. 7, 8 and 9, which in turn may be welded to the oven side Walls Il substantially as hereinabove described. `However. it is tobe un- Y derstood that it is preferred that the corrugations 22 be formed' Within a strip and the strip as a whole placedy ywithin the depressed portion l2 or I2a. l

i Variousfurther modifications may be made in the device embodying myinventionl without departing from the spirit and scope thereof.

Moreover, it will be understood that myinvention 'is not limited in its application to ovens but 'may equally well be employed in refrigerators and other devices where glides or supports are reiquired. I desire, therefore, that only such limitations shall be' placed thereonsas are imposed by the prior art'and the appended claims.

f I claimas my invention:

1. In a device ofthe character described, the combination of a pair of oppositely disposed metal walls, eachof said walls having a. shallow depressed portion andv an aperture entirely surrounded by Ithe material of the wall withinv the boundaries of s'aid. portion,said apertures being oppositely ldsposed, and separate sheets of metal secured to the respective walls-within said depressed portions andeach having a corrugation therein respectively extending through the corresponding aperture, the thickness of each of said sheets being substantially equal to the depthof said depressed'portion, whereby the planes of the outer-face of each sheet and of the adjacent undepressedl wall portions substantially coincide to Vprovide a relativelysmooth overall surface.

2-. In a deviceof the character described, the combination of a. pair of oppositely disposed metal -walls, each of said `wallshaving an aperture therein entirely surrounded by the material of the wall, saidv apertures being oppositely disposed,

and-separatesheets of metal secured to therespective walls and each having a plurality of irregular apertures therein and a corrugation between twoapertures, and each corrugation extending through the corresponding wall aperture.

' 3. `In' a device' of the character described, the

combination of a pair of oppositely disposed metal walls, eachof said walls having a shallow de Dressed portion and an aperture entirely surrounded by the material of the wan within the? tween two apertures, and each corrugation ex' tending through the corresponding wall aperture.

4. In a device of the character described, the combination of a pair of oppositely disposed metal walls, each of said walls having a plurality of apertures therein eachv entirely surrounded by the material of the wall, said apertures being oppositely disposed in pairs, and separate sheets of metal secured to the respective walls and each having a series of irregular apertures therein with a corrugation intermediate eachpair'of said irregular apertures, said corrugations in each sheet extending through the corresponding pluralityof wall apertures 'f 5. In a device of the character described, the combination of a pair' of oppositely disposed metal'A walls, each of said walls having fa. shallow'de# pressed portion and a plurality ofapertures each entirely surrounded by the material of the wall within the boundaries of saidportio'n said apertures being oppositely" disposed in pairs, and separate sheets of metal securedv to `the respective walls withinsaid depressedA portions 'and each having a series of irregular apertures therein with a corrugation intermediate each pair-of said ir"- regular apertures, said corrugations in each sheet extending through the corresponding plurality of wall apertures. ,v

6. In a device ofthe character'described, an inner casing defined by a bottom Wall, atop wall, and a pair of substantially vertical side walls,`two of said substantially verticali'walls having a plurality of shallow depressed portions formed'therein and spaced longitudinally with respect-to the depth of the casing and'a'plurality of verticallyspaced apertures entirely surrounded by the ma'- terial of the walls formed withintheboundaries Vof each depressed portion', and separate sheets of metal placed within said depressed portions substantially flush with the outsidevof said side Walls, and each of said metal sheets having a plurality of vertically-spaced corrugations which extend through the correspondingapertures in the substantially vertical Awallsjirlto the space enclosed by thecasing.` y ,1

7. In oven liners and the like, the combination of a substantially rectangular ycasing formed of sheet metal and having top, bottom, and side Walls, a series of apertures being l'provided in intermediate portions of v`each side wall, said apertures on one wall being located'at different'elevations and respective apertures on the opposite wall being disposed at corresponding elevations, and ansheetof metal secured to the outer surface of each side wall 'and covering the apertures therein, each ofvsaid sheets having projections formed thereon vcorresponding in number and position with the apertures in the'adjacent side wall of the voven and saldi projections extending through their corresponding apertures to provide rack supports inside the oven liner, each of said sheets also having its projectionsdrawn from the metal ofgthe sheet so that'` both the projections and the sheet are formed from a single sheet of material and each of said sheets having slots spaced betweenl the projections to afford such forming of the projections, said vslots being covered by non-apertured portions of the liner.

, e ALFONS BARNSTEINER.

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